CODEWITHSUNDEEP
androidmultithreadinghandler
kAnNaN
kAnNaN

Reputation: 3679

Programing Threads and handlers in android?

i have executed the following code 

public class Activity_Threads_Handler extends Activity {


private int mSec;

TextView tv;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    tv = (TextView) findViewById(R.id.TextView01);
    startHeavyDutyStuff();
}

void startHeavyDutyStuff() {

    // Here is the heavy-duty thread
    Thread t = new Thread() {

        public void run() {
            try {
                while (true) {

                    mSec = Calendar.getInstance().get(Calendar.MINUTE);
                    // Send update to the main thread
                    messageHandler.sendMessage(Message.obtain(
                            messageHandler, mSec));

                    Thread.sleep(1000);
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }
    };
    t.start();
}

// Instantiating the Handler associated with the main thread.
private Handler messageHandler = new Handler() {

    @Override
    public void handleMessage(Message msg) {
        tv.setText(msg.what);
    }

};

}

the above code is to display the current second on to a TextView continually updating it ...

and i got the following error in my logcat

FATAL EXCEPTION: main android.content.res.Resources$NotFoundException: String resource ID #x22 at android.content.res.Resources.getText(Resources.java:201) at android.widget.TextView.setText(TextView.java:2857) at com.kpj4s.Threads_Handler.Activity_Threads_Handler$1.handleMessage(Activity_Threads_Handler.java:56) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:3647) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) at dalvik.system.NativeStart.main(Native Method)

can some one help me out pls .. thanks :)

Upvotes: 0

Views: 1265

Answers (2)

Cristian
Cristian

Reputation: 200080

The problem is:

tv.setText(msg.what);

What are you trying to do?

The problem is that msg.what is an integer and setText receives: either a String or an integer that is an android resource (for instance R.string.something). Thus, if you want to show the msg.what content use tv.setText(String.valueOf(msg.what)) instead.

Upvotes: 2

Reuben Scratton
Reuben Scratton

Reputation: 38707

TextView.setText(int) expects the integer parameter to be a resource identifier. You need to convert it to a String, i.e. you want:

tv.setText(Integer.toString(msg.what));

Upvotes: 1

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